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Blog Jun. 4, 2007 | Share

Thoughts on Wal-Mart and ISP Data

Last month in the Wall Street Journal, I read an article by Carl Bialik, aka “The Numbers Guy,” in which he mentioned the use of retailers’ UPC sales scanner data in the consumer packaged goods industry for measuring manufacturers’ market share trends. According to The Numbers Guy “Industrywide U.S. sales data have been hamstrung by the omission... Read more